Remote control device.



REMOTE CONTROL DEVICE.

APPLICATION FILED JAN. 3. 19M.

Patented Nov. 5, 1918.

llll UNITED STATES PATENT OFFICE.

HARRY T. GOSS, OF RUTHERFORD, NEW JERSEY, ASSIGNOR TO THE AEOLIAN COMPANY,

' A CORPORATION OF CONNECTICUT.

REMOTE CONTROL DEVICE.

Specification of Letters Patent.

Patented Nov. 5, 1918.

Application filed January 3, 1917. Serial no. 140,446.

To all whom it may concern:

Be it known that I, HARRY T. Gross, a

My invention relates to improvements in remote-control for phonographs or other motor driven musical instruments, and more specifically for electrically actuated means for controlling the driving motors and expression devices for such instruments, such, for example, as a valve for varying the volume of sound produced by a p onograph.

Its objectis to provide a simple, eflicient and sensitive electro-responsive actuating mechanism for starting the driving motor of a phonograph and. for actuating an ex- 7 pression device therefor, with a manually operable remote control device by means of which a person at any desired distance from such aninstrument may start and stop the instrument and may also control the expression device therefor, atwill.

In order that my. invention may be thoroughly understood I will now proceed to describe the same in the following specification, and then point. out the novel features thereof in appended-claims.

Referring to the drawings: Fi tion, of certain parts of a phonograph or the like, with its driving -motor and with actuating and control devices 'embodyln'g my invention applied thereto, the latter being shown diagrammatically. I

Fig. 2 is an elevation of certain parts of a phonograph driven by a spring motor with certain parts of the present invention applied thereto, this'figure showing certain modifications in construction which are made to adapt the invention to this type of motor drive.

Like charactersof reference designate corresponding parts in all the figures.

10 designates'the tone arm of the instrument to be controlled and 11 a part of its sound chamber. 12 is the expression device, in this case a valve arranged to be moved by a rod- 13 toward or away from its gure 1 is a side elevatlon partly in sec-- seat, to thereby-produce more or less restriction to the size of the sound passage and .to

thereby vary the volume of sound emitted from the instrument.

14 is the revoluble platen upon which the sound producing records are supported and 15 is a shaft connected by suitable gearing with said platen. 16 is an electric motor connected by means of a belt 17 and suitable sheaves with the shaft 15.

An electro-responsive control motor is designated generally by the reference numeral 20. This motor comprises a pair of similar solenoids 2122, a common core 23, and a dash pot 24 connected with the core. 25 is one arm of a bell crank lever pivoted at 26 which is connected with the core 23 by a link 27. Another arm 28 of this lever is connected with the valve rod 13 by means of a rod 18 and a small bell crank lever 19. 29 is a rod extending rigidly'from the bell crank lever and carrying a weight 30 by means of which the bell crank lever and the different elements which are connected stat 34, a movable contact 42 which is adapt ed to be moved over various points on the rheostat 41 and a handle or lmob 43. It

also'com'prises a circuit closer of which 44 .is a pivoted lever which carries a contact 45 which is adapted to be moved by a button 46 against a stationary contact 47.- 48

is another but-ton on the other side of the pivot of the lever 44' by means of which the contacts 45 and 47 may be separated.

A sensitive relay 50 is interposed between this manual control device and the electroresponsive control motor 20. This relay compnses an electro-magnet 51 of which the pole piece is desi ated 52. 53 is a polarized armature ivote at 54 to the frame of magnet 51. his relay also comprises two magnet windings 55-56 of an equal number of convolutions' wound in opposite directions.

57 and 58 are stationary contacts between which is a movable contact carried by the pivoted armature 53. Plus and minus designate mains from a suitable source of electrical supply. From the plus. main a wire leads through a' resistance 60 and by means I sistance 60 leads through the magnet windmanuall in '55, and 63 is a wire leadin from the ot er side of this magnet winding to one end of rheostat 34. 64 is a wire leading from the contact 33 to wire 72 which is connected with contact 45 and through which and contact 47 and wire 73 the circuit is;

, of this will completed to the minus main.

A wire 66 is connected with stationary,

contact 57 and with one end of the winding of solenoid 21. The other end of this solenoid winding is connected by wires 67 and 68 with the minus main.

69 is a' wire from stationary contact 58 to one end of solenoid winding 22, the other end of which is connected through wires 67 and 68 with the minus main.

From the plus main a wire 70 runs to one end of the winding of .a control magnet 71. 72 is a wire from the other end of this magnet winding to contact 45 of the manual control device. The contact 47 is connected by wire 73 which runs back to the minus main.

The supply mains for the actuating motor 16- are designated by 80 and 81. The wire 80 is connected directly withone of the terminals. of motor 16. The other terminal of the motor is connected by a wire 82 with a which t e motor may be connected with a stationary contact 84. 85 is a movable contact on a pivoted arm'86 which is connected with the main '81. This arm carries the armature of magnet'74 which is so arranged that when energized it will move the arm 86 in such a manner as to close the movable contact 85 against the stationary contact 84 and thus complete the motor circuit.

Before specifically describing the structures shown in the other figures of the drawing, I will describe the operation of this de vice. When the manual control device 40 is in the position shown the sensitive relay 50 j the control motor 20 and the valve 12, will be in the positions in which they are shown and the apparatus will be at rest.

The operator may start or stop-the instrument at will by depressing button 46 or button 48. When button 46'is de ressed a circuit is closed at eontacts 454 through the operated switch 83 by means of' control magnet 71. This circuit may be traced from the plus main through wire 70, winding of magnet 71, wire 72, contacts 45-47 and wire 73, to the minus main. The energization of the electro-magnet 71 will 70 cause its armature 86 to be attracted to move contact 85 against contact 84 thus starting the driving motor 16 and the phonograph.

Depressing button 48 will break the circuit through magnet 71 allowing its armature to swing back to break the circuit through motor .16 between the contacts 8485, thus stolipilig the instrument.

Closing the contacts 45 and 47 also completes the circuits through the two sensitive relay windings 55-56. As these are equal and opposite they neutralize each other and the relay remains in a state of magnetic balance. v

. Now, if the manual control device is moved along) on rheostat 41, the first efi'ect e to insert a part of the resistance of this rheostat in the circuit throu h magnet winding 56. This will immediate y throw themagnet 51 out of magnetic balance and will cause the'polarized armature 53 to be drawn to one side, in this case tothe right. The circuit will thereb be closed to the solenoid winding 21. his will of course cause the core 23 to be moved upward. This upward movement will through the mechanical connections previously described, move the valve 12 upward toward its seat to thereby restrict the size of the passage which it controls in thesound chamber. The movement of the solenoid 23 and its connected parts will continue until the movable contact 33 reaches a position on rheostat 34 which corresponds with the position 105 which the contact 42 now has on rheostat 41. This will reduce the current in magnet winding 55 to the same extent that the currentin magnet winding 56 has been reduced and will thereby reestablish the magnetic effect ing the circuit throughthe solenoid winding 21 so'that the core 23 and the parts mechanically connected therewith will come to rest.

A further movement of contact 42 on rheostat 41 in the same direction will similarly cause a further upward movement of the valve 12. If the contact 42 is moved back toward its initial position this will immediately cause an increase of current in' the magnet winding 56 which will cause the polarized armature 53, and its contact to be moved to the left; in this case closing a circuit from the generator through contact 58 to and through solenoid winding 22. In this manner the core 23 will be moved downward and this downward movement will be imparted to the valve 12 until the contact 33 reaches a position on rheostat 34 corresponding with the new position of contact 42 on rheostat 41. This will, as in the former case,

reestablish the balance between the magnetic efiects of the magnet windings 55-56 and allow the pivoted arm 53' to again assume its central position, thus breakmg the circuit and 77 of the circuits previousl described.

It may be seen that when so enoid 94 is energized it will cause the brake shoe 92 to be lifted away from the brake wheel 91 to allowthe" spring motor driven shaft 90 to rotate shaft 15 and the platen 14, and that when the circuit through solenoid 94 is broken the brake shoe 92 will come down onto the brake wheel-91 to arrest rotation of these parts. 1 95 is a pivoted lever by means of which a pin 96 may be moved manually in a slotted yoke 97 which is connected with the solenoid core 93. These arts are'provided so that the rotating mechanism may be started and stopped at will when my device is not used. I have illustrated several modifications of certain parts of the apparatus to show that I do not limit myself to any specific form or construction, and in fact -mtend no limitations other than those imposed b the appended claims. "While I have shown the invention as applied to the control of a phonograph, it is obvious that it is equally applicable to any. motor driven sound producmg instrument.

.instrument hav movable expression varymg member, electro- What I claim is:

1. In combination with a sound producing instrument having a driving motor and a movable expression varying member,.a control motor connected with said member, and a remote control device connected with said control member and comprising a circuit eloser'for said driving motor. 4

2. In combinailion with a sound producing g a driving motor and a magnetic starting and stopping means for said driving motor, ancIectrO-magnetic control motor arranged' to actuate sa1d member different desired mounts in opposite directions, and a remote control device comprising a circuit closer electrically connected with said starting and stopping means, and

an adjacent current varying means electri-.

cally connected with said control motor. I

3. In combination with a sound producing instrument having a driving motor and a movable expression varying member, electro-m'agnetic starting and stopping means for said driving motor, an electrQ-magnetic control motor arranged to actuateaaid menber difi'erent desired amounts in opposite directions, and a "remote control device comprising a circuit closer electrically connected with said starting and stopping means/and current varying means electrlcally connected with said control motor through said circuit closer.

4. In combination with a sound producing instrument having an electric driving motor and a movable expression varying member, an electromagnetlc relay for startin and stoppin said driving motor, a circuit for control ing said relay, an electromagnetic control motor connected to actuate said member, a remote manual control device comprising a circuit closer in said relay circuit, and an adjacent current varying means electrically connected with saidcontrol motor. a p

In witness whereof I have hereunto set my hand this 28 day of December 1916.

HARRY T. eoss; 

